PCI: aerdrv: rework find_source_device

Return bool to indicate that the source device is found or not.
This allows us to skip calling aer_process_err_devices() if we can.

And move dev_printk for debug into this function.

v2: return bool instead of int

Signed-off-by: Hidetoshi Seto <seto.hidetoshi@jp.fujitsu.com>
Reviewed-by: Kenji Kaneshige <kaneshige.kenji@jp.fujitsu.com>
Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>

1 files changed, 16 insertions, 12 deletions

diff --git a/drivers/pci/pcie/aer/aerdrv_core.c b/drivers/pci/pcie/aer/aerdrv_core.c
index ad15eea54fd0..5fa5c76719b0 100644
--- a/drivers/pci/pcie/aer/aerdrv_core.c
+++ b/drivers/pci/pcie/aer/aerdrv_core.c
@@ -215,11 +215,13 @@ added:
 /**
  * find_source_device - search through device hierarchy for source device
  * @parent: pointer to Root Port pci_dev data structure
- * @err_info: including detailed error information such like id
+ * @e_info: including detailed error information such like id
  *
- * Invoked when error is detected at the Root Port.
+ * Return true if found.
+ *
+ * Invoked by DPC when error is detected at the Root Port.
  */
-static void find_source_device(struct pci_dev *parent,
+static bool find_source_device(struct pci_dev *parent,
                 struct aer_err_info *e_info)
 {
         struct pci_dev *dev = parent;
@@ -228,9 +230,17 @@ static void find_source_device(struct pci_dev *parent,
         /* Is Root Port an agent that sends error message? */
         result = find_device_iter(dev, e_info);
         if (result)
-                return;
+                return true;
 
         pci_walk_bus(parent->subordinate, find_device_iter, e_info);
+
+        if (!e_info->error_dev_num) {
+                dev_printk(KERN_DEBUG, &parent->dev,
+                                "can't find device of ID%04x\n",
+                                e_info->id);
+                return false;
+        }
+        return true;
 }
 
 static int report_error_detected(struct pci_dev *dev, void *data)
@@ -639,12 +649,6 @@ static inline void aer_process_err_devices(struct pcie_device *p_device,
 {
         int i;
 
-        if (!e_info->dev[0]) {
-                dev_printk(KERN_DEBUG, &p_device->port->dev,
-                                "can't find device of ID%04x\n",
-                                e_info->id);
-        }
-
         /* Report all before handle them, not to lost records by reset etc. */
         for (i = 0; i < e_info->error_dev_num && e_info->dev[i]; i++) {
                 if (get_device_error_info(e_info->dev[i], e_info))
@@ -702,8 +706,8 @@ static void aer_isr_one_error(struct pcie_device *p_device,
 
                 aer_print_port_info(p_device->port, e_info);
 
-                find_source_device(p_device->port, e_info);
-                aer_process_err_devices(p_device, e_info);
+                if (find_source_device(p_device->port, e_info))
+                        aer_process_err_devices(p_device, e_info);
         }
 
         kfree(e_info);